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• W2003463004 abstract "We investigated kainate-induced excitotoxicity in embryonic rat hippocampal cells cultured in a chemically defined medium. Treatment with kainate for 24 h resulted in neuronal death, as assessed by the release of lactate dehydrogenase into the culture media. This neurotoxic effect was kainate dose- and culture age-dependent. EC50 of kainate was 127 +/- 11 microM. 2,3-dihydroxy-6-nitro-7-sulfamoylbenzo (f)quinoxaline (NBQX) completely blocked the toxicity, while MK801, an N-methyl-D-aspartate (NMDA) receptor antagonist, also blocked it but not completely. Furthermore, alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) attenuated the kainate injury, while the selective and noncompetitive AMPA-preferring receptor antagonist 1-(4-aminophenyl)-4-methyl-7, 8-methylenedioxy-5H-2,3-benzo-diazepine (GYKI 52466) blocked it completely. Concanavalin A (ConA), which potentiates the response to kainate at kainate-preferring receptors, had little effect on kainate toxicity. Further, AMPA alone induced little toxicity, but produced remarkable toxicity when cyclothazide was used to block the desensitization of AMPA-preferring receptors. These results indicate that kainate excitotoxicity in hippocampal cultures is mediated by AMPA- but not kainate-preferring receptors, and that it involves NMDA-receptor-mediated toxicity. The non-desensitizing response at AMPA-preferring receptors may play an important role in kainate-induced excitotoxicity." @default.
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• W2003463004 date "1997-11-01" @default.
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• W2003463004 title "Kainate excitotoxicity is mediated by AMPA- but not kainate-preferring receptors in embryonic rat hippocampal cultures" @default.
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• W2003463004 doi "https://doi.org/10.1016/s0197-0186(97)00011-9" @default.
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